ZoneAlarm's Internet Security 5.5 is one of the best security suites we've seen. Its interface is far easier to use and understand than the competition's, and its feature set, which includes a personal information vault and instant-messenging encryption, puts the comparably priced and to shame. The latest ZoneAlarm version really beefs up its spam-blocking capability using partnered technology from , without slowing your PC down. ZoneAlarm Internet Security is now the suite to beat for all-around Internet privacy and security, whether you use your PC from home or take the corporate laptop out on the road. ZoneAlarm Internet Security 5.5 is available as a boxed CD or as an 11MB download. (You can download a trial version here from Download.com.) When you install, the program asks for your Internet connection method (dial-up, DSL, cable, and so on), the type of computer you use (single user, family, laptop, workstation), and whether you're part of a network and already use antivirus software. This information provides ZoneAlarm Internet Security with an initial configuration that you can tweak later if necessary.
After rebooting your PC, ZoneAlarm launches its main interface, the Control Center, which is clean and concise, with configuration options intuitively divided under 10 tabs (Overview, Firewall, Program Control, Antivirus, E-mail Protection, Privacy, ID Lock, IM Security, Web Filtering, and Alerts & Logs). For example, you can customize the ad-blocking feature to permit banner ads while removing animated and pop-up ads.
Overall, ZoneAlarm Internet Security's configuration is as simple or complex as you prefer. For instance, set the suite's Internet cookie management to off, turn it on high (blocking all cookies), or leave it at medium to permit session-only cookies. If you want more detailed control, however, you can accept each tracking cookie on your computer for whatever length of time you like. While Norton and McAfee also allow for these options, you'll have to dig several layers down to find them.
Considering the suite's functionality, it requires relatively little of your memory resources: roughly 9MB of RAM. In informal tests, the firewall produced almost no degradation in speed while accessing the Web. Norton and McAfee introduce a little more system drag. The only inconvenience occurred shortly after installation, when ZoneAlarm asked us to allow or deny each of our Internet browsers and various other programs to interact with the Web. Once set up, however, the suite's firewall is transparent.